Update and Delete Data Using PHP, Forms and Mysql

minicin · 12-05-2008 12:52pm #1

Hi All

I was wondering if any of you could help me with a problem I am having with Updating my Database. I am trying to do exactly what is on this website

http://www.dmxzone.com/ShowDetail.asp?NewsId=4114

But the code from the site does not seem to work.

I was wondering if anybody had a similar code that I could try I have trawling the net looking for one.

Thanks in advance!

aidan_walsh · 12-05-2008 12:55pm

Doesn't work how? What're you seeing happen?

What form and table structure do you have?

minicin · 12-05-2008 12:59pm

I have tried taking that code and changing the relevant parts but nothing comes up.

I am not sure where the error is. I am basically trying to echo the articles from my database and add a link to update and delete.

aidan_walsh · 12-05-2008 1:03pm

We still need to see what you changed it to...

minicin · 12-05-2008 1:11pm

This is what I have changed the code to. I really am trying to update my database using edit and delete links, trying to echo the articles into a form so I can update them from there. This is the closest code I could find to do it.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Untitled Document</title>
</head>

<body>
<?php
if(!isset($a){
$link = @mysql_connect("localhost", "root", "root");
if(!$link){
echo('Error connecting to the database: ' . mysql_error());
exit();
}
$db = @mysql_select_db('GlobalWarrior');
if(!$db){
echo('Error selecting database: ' . mysql_error());
exit();
}
$query = "SELECT Aid, AAuthor, ATitle, AAbstract, AArticle, ATimeStamp FROM GlobalWarriorArticles ORDER BY Aid";
$result = @mysql_query($query);
if(!$result){
echo('Error selecting information: ' . mysql_error());
exit();
}
if (mysql_num_rows($result) > 0){
while($row = mysql_fetch_object($result))
{
?>
<font size="-1"><b><?php echo $row->AAuthor; ?></b><i><?php echo
formatDate($row->ATimeStamp); ?></i></font>
<br />
<font size="-2"><a href="edit.php?a=edit&Aid=<?php echo $row->Aid;
?>">edit</a> |
<a href="delete.php?a=delete&Aid=<?php echo $row->Aid; ?>">delete</a></font>
<?php
}else{
?>
<font size="-2">No information in the database</font>
<?php }
mysql_close($link);
}elseif($a == 'edit'){
if(!isset($update)){
$link = @mysql_connect("localhost", "root", "root");
if(!$link){
echo('Error connecting to the database: ' . mysql_error());
exit();
}
$db = @mysql_select_db('GlobalWarrior');
if(!$db){
echo('Error selecting database: ' . mysql_error());
exit();
}
$query = "SELECT Aid, AAuthor, ATitle, AAbstract, AArticle, ATimeStamp FROM GlobalWarriorArticles Where Aid = '$i'";
$result = @mysql_query($query);
if(!$result){
echo('Error selecting information: ' . mysql_error());
exit();
}
mysql_fetch_object($result);
?>
<form name="form1" method="post" action="edit.php?a=edit&Aid=<?php echo($id)
?>&update=1">
<table width="50%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="50%">Name</td>
<td><input name="Author" type="text" id="AAuthor" value="<?php echo($row-
>name) ?>" /></td>
</tr>

<tr>
<td>Email</td>
<td><input name="Title" type="text" id="ATitle" value="<?php echo($row-
>email) ?>" /></td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td>Headline</td>
<td><input name="Abstract" type="text" id="AAbstract" value="<?php
echo($row->headline) ?>" /></td>
</tr>
<tr>
<td>News Story</td>
<td><textarea name="Article" id="AArticle" value="<?php echo($row->story)
?>"</textarea></td>
</tr>
</tr>
<td colspan="2"><div align="center">
<input name="hiddenField" type="hidden" value="update" />
<input name="add" type="submit" id="add" value="Update" />
</div></td>
</tr>
</table>
</form>
<?
}else{
$query = "UPDATE GlobalWarriorArticles SET AAuthor = '$Author, ATitle = '$Title', AAbstract =
'$Abstract', AArticle = '$Article', ATimeStamp = NOW() WHERE Aid = '$id'";
$result = @mysql_query($query);
if(!$result){
echo('Error updating news item: ' . $mysql_error());
exit();
}else{
mysql_close($link);
echo('Update Successful!');
}
}elseif($a == 'delete'){
$link = @mysql_connect("localhost", "root", "root");
if(!$link){
echo('Error connecting to the database: ' . mysql_error());
exit();
}
$db = @mysql_select_db('GlobalWarrior');
if(!$db){
echo('Error selecting database: ' . mysql_error());
exit();
}
$query = "DELTE FROM GlobalWarriorArticles WHERE Aid = '$id'";
$result = @mysql_query($query);
if(!$result){
echo('Error selecting information: ' . mysql_error());
exit();
}
mysql_close($link);
echo('News item deleted.');
} ?>

democrates · 12-05-2008 1:32pm

The first php statement

if (!isset($a)) {

The $a is not set anywhere before that, presumably you need to get it from $_REQUEST based on the likes of

<a href="edit.php?a=edit&Aid=

The original author must have had register_globals on, bad news.

Also watch the curly braces, there seems to be a missing terminating brace somewhere.

Update and Delete Data Using PHP, Forms and Mysql

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